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As the Universe Expands, Does Space Stretch?
- webmaven 5y agoIf I've understood the post correctly, the Planck length (as one of the inherent properties of space-time) does not change as the universe expands. You do actually get 'more space'. This implies (I think) that in some respects the expansion of the universe is negentropic (though not enough to counteract entropy overall), as there is no law of conservation of space. So, an Alcubierre drive that contracts space ahead and expands it behind a vehicle may not need to actually convert mass or energy into space, or gravity, in any fashion. If you're clever enough, you might actually be able to get FTL (and antigravity, etc.) for free, or at least heavily subsidized, as it were, with the only real costs being the changes in potential energy (and the 'administrative' costs of ensuring that changes in potential energy don't destroy the vehicle).